The host troubleshooting topics provide solutions to potential problems that you might encounter when using your vCenter Server and ESXi hosts. What to read next Troubleshooting vSphere HA Host States vCenter Server reports vSphere HA host states that indicate an error condition on the host. Such errors can prevent vSphere HA from fully protecting the virtual machines on the host and can impede vSphere HA's ability to restart virtual machines after a failure. Errors can occur when vSphere HA is being configured or unconfigured on a host or, more rarely, during normal operation. When this happens, you should determine how to resolve the error, so that vSphere HA is fully operational. Authentication Token Manipulation ErrorWhen you try to create a password that does not meet the authentication requirements of the ESXi host, an error occurs. Unable to Download VIBs When Using vCenter Server Reverse ProxyYou are unable to download VIBs if vCenter Server is using a custom port for the reverse proxy. Parent topic: Troubleshooting Overview